95 articles 

inria-00104751, version 1

On-line Handwritten Character Recognition Selectively Employing Hierarchical Spatial Relationships among Subpatterns

Junko Tokuno () 1, Mitsuru Nakai () 2, Hiroshi Shimodaira () 3, Shigeki Sagayama () 4, Masaki Nakagawa () 1

Tenth International Workshop on Frontiers in Handwriting Recognition (2006)

Abstract: This paper proposes an on-line handwritten character pattern recognition method that examines spatial relationships among subpatterns which are components of a character pattern. Conventional methods evaluating spatial relationships among subpatterns have not considered characteristics of deformed handwritings and evaluate all the spatial relationships equally. However, the deformations of spatial features are different within a character pattern. In our approach, we assume that the distortions of spatial features are dependent on the hierarchy of character patterns so that we selectively evaluate hierarchical spatial relationships of subpatterns by employing Bayesian network as a post-processor of our sub-stroke based HMM recognition system. Experiments on on-line handwritten Kanji character recognition with a lexicon of 1,016 elementary characters revealed that the approach we propose improves the recognition accuracy for different types of deformations.

  • 1:  Tokyo University of Agriculture and Technology (TUAT)
  • Tokyo University of Agriculture and Technology
  • 2:  Toyama Prefectural University
  • Toyama Prefectural University
  • 3:  The Centre for Speech Technology Research [Edinburgh] (CSTR)
  • University of Edinburgh
  • 4:  The University of Tokyo [Toyo]
  • The University of Tokyo ( Japan)
  • Domain : Computer Science/Document and Text Processing
    Computer Science/Computer Vision and Pattern Recognition
  • Keywords : On-line handwriting recognition – sub-stroke HMM – Bayesian network – distorted handwriting – spatial relationships among subpatterns
  • Comment : http://www.suvisoft.com
 
  • inria-00104751, version 1
  • oai:hal.inria.fr:inria-00104751
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  • Submitted on: Monday, 9 October 2006 12:25:19
  • Updated on: Monday, 9 October 2006 13:38:03